Power law modeling of acoustic cavitation erosion: the hemispherical pit model

Abstract

A power law model for cavitation erosion is proposed herein that represents volume loss as the creation and subsequent enlargement of hemispherical pits in the surface of the solid. The cumulative volume loss (CVL) of a material is expressed as an Arrhenius term, containing the energy of pit growth, E pg , multiplied by a power law function with the pit radius growth rate, k, as a prefactor and a time exponent, n. The model is verified through fitting of experimental cavitation erosion data for commercially-available aluminum, copper, and zinc substrates, as well as fitting selected data from the International Cavitation Erosion Test and through comparison with other cumulative volume loss models.

Reactive cavitation erosion as a technique for production of functionalized copper hydroxychloride nanomaterials

“…Cavitation erosion experiments were performed as described previously [8] using the apparatus shown diagrammatically in figure 1. Experimental specimens consisted of 12.5 mm discs of Cu 110 (Superior Washer and Gasket Corp.) with thicknesses of ∼1.54 mm and nominal grain size 50 nm.…”

“…Herein the production of functionalized nanomaterial via Reactive Cavitation Erosion was investigated for Cu in 1 M aqueous GHCl. Copper was chosen due to its high cumulative volume loss during cavitation erosion [8] and low reactivity with water. Guanidine hydrochloride was chosen due to evidence that GHCl inhibits corrosion of copper [9] and because the functionalized product-clinoatacamite-is of interest as a quantum magnet material [10].…”